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ILeVo Blackleg seedling control in canola

By 21 September 2020January 20th, 2021South Stirlings

Objective

To demonstrate BASF’s new canola blackleg seedling treatment, against existing treatments on the market.

Background

Blackleg, caused by the fungus Leptosphaeria maculans is one of the most serious diseases of canola in Western Australia. This trial was sown on the 25th of May, at a site with previous history of Blackleg, in the South Stirling region. A dry start to the season correlated to a decile 1 year for disease. The area finished with a GSR of 400ml with the first major rainfall event in August.

PRE SEEDING

Early Knockdown -17/4/2020: Glyphosate 450 1.5L/ha, Oxyflurofen 240 EC 60ml/ha, Hammer 400 EC 15ml/ha, Kamba 750 200ml/ha, Wetter1000 0.2%, Ammonium Sulphate 1%.

Pre seeding knockdown- 27/4/2020: Glyphosate 450 1L/ha, Goal 60ml/ha, Hammer 400 EC 15ml/ha, Wetter1000 0.2%, Ammonium Sulphate 1%.

Immediately pre seeding – 25/5/2020: Glyphosate 450 1.5L/ha, Oxyflurofen 240 EC 60ml/ha, Hammer 400 EC 15ml/ha, Kamba 750 200ml/ha, Wetter1000 0.2%, Ammonium Sulphate 1%.

Early Nitrogen Application- 25/5/2020: 80L/ha Flexi-N

SEEDING

Seeding – 25/5/2020: Bonito Canola 3kg/ha, Double Phos 132kg/ha, Sulphate of potash 50kg/ha.

POST EMERGENT

Nitrogen Top-up- 24/6/2020: 80L/ha Flexi-N

Results

Emergence Counts

Yield

Disease severity at two leaf crop stage

Internal infection at windrowing

Emergence photos

Maxim XL

Saltro Duo + Maxim XL

Control blackleg infection

Key Findings

  • Decile 1 year for disease meant that there was low disease pressure.
  • No blackleg at 2 leaf crop stage and in the upper canopy throughout crop growth.
  • Significant difference between treatments for internal infection at windrowing, with the Ilevo treatment reducing internal infection by 50% compared with the control, but was slightly less effective than Maxim XL and Saltro Duo.
  • No significant yield differences between treatments, however, Ilevo treated plots yielded the highest by 100kg/ha.
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